Primer location.
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- Airman
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- Joined: 26 Mar 2021, 05:33
Primer location.
I'm wondering where the primer shot is actually sent on the engine, is it directly to the cylinders or into the intake manifold. I'm struggling to start the beast when it's close to freezing.
Re: Primer location.
Don't know. I can tell you that flying out of Barrow, Alaska at a temp of -16C, it took 12 seconds of prime to get her to start.P40 Master wrote: ↑04 Aug 2021, 09:13 I'm wondering where the primer shot is actually sent on the engine, is it directly to the cylinders or into the intake manifold. I'm struggling to start the beast when it's close to freezing.
- DHenriques_
- A2A Chief Pilot
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- Location: East Coast United States
Re: Primer location.
As I recall the electric primer when actuated sends a direct shot of fuel under pressure directly into the induction manifold.P40 Master wrote: ↑04 Aug 2021, 09:13 I'm wondering where the primer shot is actually sent on the engine, is it directly to the cylinders or into the intake manifold. I'm struggling to start the beast when it's close to freezing.
VERY easy to over prime a P51. Generally you only need a few seconds.
Dudley Henriques
- Killratio
- A2A Spitfire Crew Chief
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Re: Primer location.
I'm sure so Dudley!
The very early Spitfires had the option to prime the cylinders directly or the Carby.
Cylinders turned out to be a spectacularly bad idea and after a series of engine fires the Primer Cock to make the selection was first wired off, its use banned and soon after removed altogether. I can't imagine that they went backwards on the 1650/266!
The very early Spitfires had the option to prime the cylinders directly or the Carby.
Cylinders turned out to be a spectacularly bad idea and after a series of engine fires the Primer Cock to make the selection was first wired off, its use banned and soon after removed altogether. I can't imagine that they went backwards on the 1650/266!
- DHenriques_
- A2A Chief Pilot
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- Location: East Coast United States
Re: Primer location.
Every time I see one of those images of either a Spit or a 51 starting with flames coming out of every stack and wrapping all the way around the cowling I always enter a comment;Killratio wrote: ↑04 Aug 2021, 21:32 I'm sure so Dudley!
The very early Spitfires had the option to prime the cylinders directly or the Carby.
Cylinders turned out to be a spectacularly bad idea and after a series of engine fires the Primer Cock to make the selection was first wired off, its use banned and soon after removed altogether. I can't imagine that they went backwards on the 1650/266!
" As God is my judge.............I shall have more primer.............MORE I SAY"!
LOL. ))))))))
- Killratio
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Re: Primer location.
DHenriquesA2A wrote: ↑04 Aug 2021, 21:48
" As God is my judge.............I shall have more primer.............MORE I SAY"!
LOL. ))))))))
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- Airman
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Re: Primer location.
Thanks alot for the information, I'll try the longer primer shot. Currently - 6 c. Having no joy at all
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- Senior Master Sergeant
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Re: Primer location.
A little trick….
Make sure the battery is charged.
Set everything up for a normal start according to the check list, but skip the priming step.
After counting the blades turn on the primer and flick mags to both. I’ve used this method several times when flying in cold weather
Make sure the battery is charged.
Set everything up for a normal start according to the check list, but skip the priming step.
After counting the blades turn on the primer and flick mags to both. I’ve used this method several times when flying in cold weather
Kind Regards
Tomas
Sim: FSX SE
Accu-Sim aircraft in my hangar:
C172, C182, P51 Civ, P51 Mil, B17, Spitfire, P47, B377 COTS,
J3 Cub, T6, Connie, P-40, V35B
A2A Accu-Sim Avro Lancaster Loading:............0.000003% complete, please wait.
Tomas
Sim: FSX SE
Accu-Sim aircraft in my hangar:
C172, C182, P51 Civ, P51 Mil, B17, Spitfire, P47, B377 COTS,
J3 Cub, T6, Connie, P-40, V35B
A2A Accu-Sim Avro Lancaster Loading:............0.000003% complete, please wait.
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